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[Isolation of Haemophilus somnus from cattle]
Veterinarno-Meditsinski Nauki
|January 1, 1985
Summary
Haemophilus somnus was newly identified in calf respiratory tracts and aborted bovine fetuses in this region. This bacterium was detected in both sick and healthy calves, indicating its potential role in bovine respiratory disease.
Area of Science:
- Veterinary Microbiology
- Bovine Respiratory Disease Research
- Bacterial Pathogenesis in Livestock
Context:
- Bovine respiratory diseases pose significant economic challenges in the cattle industry.
- The etiological agents of respiratory infections in calves are diverse and require ongoing investigation.
- Previous studies have not reported the presence of Haemophilus somnus in this specific geographical region.
Purpose:
- To investigate the prevalence of Haemophilus bacteria, specifically Haemophilus somnus, in bovine respiratory samples and aborted fetuses.
- To determine the occurrence of Haemophilus somnus in calves with and without respiratory symptoms.
- To characterize the isolated strains of Haemophilus somnus.
Summary:
- A study examined 220 respiratory and fetal samples from calves and cows.
- Haemophilus somnus was isolated from 10.1% of calf respiratory tracts and 6.2% of aborted bovine fetuses, marking its first detection in the country.
- The bacterium was found in 13% of diseased calves and 3.5% of healthy calves, often in mixed infections with other bacterial species. Twenty-one strains of Haemophilus somnus were isolated and confirmed.
Impact:
- Establishes the presence of Haemophilus somnus as a potential pathogen in the local cattle population.
- Provides baseline data for future research on the role of Haemophilus somnus in bovine respiratory disease outbreaks.
- Informs veterinary diagnostics and disease management strategies for respiratory illnesses in calves.